Santi Quaranta Martiri e San Pasquale Baylon is a Franciscan Catholic church, built in a late-Baroque style, located on Via San Francesco a Ripa in the Rione Trastevere, Rome, Italy.

The church was founded by Pope Callixtus II in 1122 and dedicated to the Forty Martyrs of Sebaste, persecuted under Emperor Licinius in 316.

Tradition holds that they died overnight from exposure from being forced unclothed on to a frozen lake.

He was also invoked by unmarried women looking for a husband with a well-known rhyming prayer, which is why the church became known in Rome as Chiesa delle Zitelle, the "church of the spinsters"[3] The saint was also considered the protector of women married to abusive and violent men or who did not fulfill their conjugal duties: hence the legend that one of these women, after having prayed to him, had in a dream the vision of the saint who dictated a recipe, based on eggs and Marsala wine, which would have given back the due desire to her husband, a recipe that in his honor was first called " S.Bayon ", then " sanbaion " and finally "Zabaione".

[1] The ceilings are frescoed by Matteo Panaria and depicts in the nave, the Glory of San Pedro de Alcantara, while the transept crossing depicts Glory of San Pascual.